truax



I 2 Sheets-Sheet 1 I L. H..TRUAX-. I Machine for Stamping Scale Beams 8L0.

' Patented Feb; 3, 1880.

N. PETERS, FHOYO-UTHOGRAPHER, WASHINGTON, D. C-

I 2 Shets-Sheeh2.

L. H. TRUAX. Maohine'for Stamping Scale Beams, 8L0.

No. 224,116. Patented Feb. 3 1880.

IMF/217w;

PLPEI'ERS, PHOTO-LITHOGRAIQHER. V'VASHWRTON D C 2o brate.

' UNITED STATES PATENT OFFICE.

LEONARD H. TRUAX, OF ST. JOHNSBURY, VERMONT.

MACHINE FOR STAMPING SCALE-BEAMS, 840.

SPECIFICATION forming part of Letters Patent No. 224,116; dated February 3, 1880.

' Application filed Jul 14, 1879.

To all whom it may concern Be it known that I, LEONARD H. TRUAX, of St. J ohnsbury, in the county of Caledonia and State of Vermont, have invented a new and 5 useful Machine for Stamping Scale-Beams,

Carpenters Squares, Machinists Rules, and other plane surfaces of metal or wood requiring figures or graduation, the tollowingbeing a full, clear, and exact description of the same,

reference being made to the accompanying drawings, forming a part of this specification.

Figure 1 is a side elevation of the machine, with portions broken away to show parts otherwise obscure; Fig. 2, an end view, and Fig.

3 a perspective view of one of the die-carriers.

' The parts a a are the die-carriers. b b represent one end of the die-boxes, placed in grooves in the jawsof the die-carriers. c c are the journals on which the die-carriers vid 01 represent two arms, connected by a knuckle-joint, a, the opposite ends of which are connected with the lower ends of the diecarriers a a by passing through the blocks e c, which serve as journals on each end. The arms 2 5 are secured to the blocks by nuts on each side, for the purpose of shortening or lengthening the connection,.in order to regulate the motion of the dies to fit beveled surfaces. The rod f connects the knuckle-j oiut with the crank 0 g, which is driven by the gears 7b and t'. On

the other end of the shaft of the pinion-gear i is a balance-wheel, which serves also as a driving-1mlley.

By this arrangement the revolution of the 5 crank produces a rocking motion of the diecarriers, causing the dies to vibrate on an arc of a circle. When the crank is carried up the knuckle-joint is elevated and the lower arms. of the die-carriers are drawn inward, and the 40 jaws which contain the dies are carried up,

and open to receive the work. The beamsquare, or whatever is to be stamped, is placed between the jaws upon rests projecting from the lower edge of one of. the die-boxes, and

when the crank goes down the jaws go down and close on the work and make the impression upon both sides at once.

' Directly back of the boxes jj are the wedges 70 k, which are drawn in or out by screws on the inside of the frame. By this means the dies are adjusted to work of any required thickness.

The driving wheel is not stopped while using; but the die-carriers are stopped at the will of the operator by a shipper attached to a clutch.

The great advantages of this machine are not only the labor-saving, but the superiorquality of the work.

By the method nowin use for stamping scale-beams the beam is crooked and twisted and lengthened, thereby requiring to be straightened, which inevitably produces more or less imperfection in the graduation, while this machine presses all the dies upon both sides of the beam at once with a pressure of two or three hundred tons, which prevents it from expanding in length, and the figures and marks are set with perfect uniformity and precision. All that is required is perfect dies to obtain absolutely perfect work.

I claim- 1. The combination of the die-carriers, the arms (1 d, articulated to the lower ends of said carriers and connected by the knuckle-joint a, the rod f, and crank g, whereby both dies are operated positively and simultaneously, substantially as described.

2. The arms 11 d, connected at their inner ends by the knuckleg'oint, as described, and

' adj ustably connected at their outer ends to the 

